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Improved dispersion of carbon nanotubes in poly(vinylidene fluoride) composites by hybrids with core–shell structure
Author(s) -
Fan Benhui,
Lu Xiaoxin,
Dang Zhimin,
Deng Yuan,
Zhou Xiying,
He Delong,
Bai Jinbo
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45693
Subject(s) - materials science , composite material , carbon nanotube , composite number , dispersion (optics) , core (optical fiber) , shell (structure) , epoxy , percolation (cognitive psychology) , fluoride , percolation threshold , electrical conductor , nanocomposite , conductivity , electrical resistivity and conductivity , chemistry , inorganic chemistry , physics , electrical engineering , engineering , neuroscience , optics , biology
Core–shell structure hybrids of carbon nanotubes (CNTs)/BaTiO 3 (H‐CNT‐BT) and commercial multi‐wall CNTs are respectively incorporated into poly(vinylidene fluoride) (PVDF) for preparing the composites near the percolation thresholds. A comprehensive investigation for CNT's dispersion and composite's conductivity is conducted between H‐CNT‐BT/PVDF and CNT/PVDF at different depths vertical to the injection's direction. Gradual increases of the conductivity in two composites are observed from the out‐layer to the core part which infers an inhomogeneous CNT's dispersion in the interior of composites due to their migration under flow during the injection. However, the use of H‐CNT‐BT fillers with core–shell structure enables to reduce this inhomogeneous dispersion in the composite. Furthermore, the conductive network of CNTs in H‐CNT‐BT/PVDF is less sensitive to the thermal treatment than the one in CNT/PVDF composite, which infers the core–shell structure of hybrids can ameliorate the sensitivity of the conductive network. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45693.